package controller;

import model.Blog;
import model.BlogDao;
import model.User;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

/**
 * Created with IntelliJ IDEA.
 * User:xieChao
 * Date:2022/12/6 16:52
 */
@WebServlet("/blogDelete")
public class BlogDeleteServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        HttpSession session = req.getSession(false);
        if(session == null){
            resp.setContentType("text/html;charset=utf8");
            resp.getWriter().write("请先登录！");
            return;
        }
        User user = (User) session.getAttribute("user");
        if(user == null){
            resp.setContentType("text/html;charset=utf8");
            resp.getWriter().write("请先登录！");
            return;
        }
        //2.
        String blogId = req.getParameter("blogId");
        if(blogId == null || "".equals(blogId)){
            resp.setContentType("text/html;charset=utf8");
            resp.getWriter().write("blogId参数不对！");
            return;
        }

        //3.
        BlogDao blogDao = new BlogDao();
        Blog blog = blogDao.selectOne(Integer.parseInt(blogId));
        if(blog == null){
            resp.setContentType("text/html;charset=utf8");
            resp.getWriter().write("该博客不存在！");
            return;
        }
        //4.
        if(user.getUserId() != blog.getUserId()){
            resp.setContentType("text/html;charset=utf8");
            resp.getWriter().write("无权限删除！");
            return;
        }
        //5.
        blogDao.delete(Integer.parseInt(blogId));
        //6.
        resp.sendRedirect("blog_list.html");
    }
}
